Question

Calcium hydroxide + Carbon dioxide → Calcium carbonate + Water
Give a balanced chemical equation for the above word equation.

Answer 1

The chemical equation for the given word equation is:

$Ca{\left(OH\right)}_2\left(aq\right)+C{O}_2\left(g\right)��CaC{O}_3\left(aq\right)+H_{2}O\left(aq\right)$

On counting the number of atoms on both sides, we have: -

• The number of calcium atoms present on the reactant and product side is 1.
• The number of oxygen atoms present on the reactant and product side is 4.
• The number of hydrogen atoms present on the reactant and product side is 2.
• The number of carbon atoms present on the reactant and product side is 1.

Hence, the equation is already balanced.